The Discover it Cash Back card is a top-rated option for Samsung Pay users who want to earn cash back on their purchases. This card offers rotating quarterly categories where you can earn 5% cash back, such as gas stations, grocery stores, restaurants, and more. Additionally, Discover will match all the cash back you've earned at the end of your first year as a cardmember. The Discover it Cash Back card also has no annual fee and provides free access to your FICO credit score.